StringReader in C#

StringReader is a class in C# that allows you to read text data from a string. It is useful when you need to read formatted text that is stored in memory, rather than reading from a file or a network socket.

Here’s an example of using StringReader to read a CSV file as a string and parse it into a list of objects:

using System;
using System.Collections.Generic;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        // CSV data as a string
        string csvData = "Name, Age, GendernJohn, 30, MalenJane, 25, Female";

        // Create a StringReader object to read the CSV data
        using (StringReader stringReader = new StringReader(csvData))
        {
            // Read the header row of the CSV data
            string header = stringReader.ReadLine();

            // Split the header row into columns
            string[] columns = header.Split(',');

            // Create a list to store the parsed objects
            List<Person> people = new List<Person>();

            // Read the remaining rows of the CSV data
            string line;
            while ((line = stringReader.ReadLine()) != null)
            {
                // Split the row into values
                string[] values = line.Split(',');

                // Create a Person object from the values
                Person person = new Person();
                person.Name = values[0];
                person.Age = int.Parse(values[1]);
                person.Gender = values[2].Trim();

                // Add the person to the list
                people.Add(person);
            }

            // Display the parsed objects
            foreach (Person person in people)
            {
                Console.WriteLine("{0} ({1}, {2})", person.Name, person.Age, person.Gender);
            }
        }
    }

    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Gender { get; set; }
    }
}

In this example, we first create a string that contains CSV data. We then create a StringReader object to read the CSV data, and use it to read the header row and the remaining rows of data. We split each row into values using the Split method, and create a Person object from the values. Finally, we add the Person object to a list of parsed objects, and display the list.

It’s important to note that StringReader can be used with any class that implements the TextReader abstract class, allowing you to read formatted text in various formats such as JSON or XML. Additionally, you should always dispose of the StringReader object once you’re finished using it, which is achieved by calling the Dispose method or wrapping it in a using statement.